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659258

Sigma-Aldrich

Carbon nanotube, multi-walled

>90% carbon basis, D × L 110-170 nm × 5-9 μm

Synonym(s):

MWCNT, MWNT, Multiwall carbon nanotube

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About This Item

CAS Number:
308068-56-6
UNSPSC Code:
12352103
NACRES:
NA.23

Assay

>90% carbon basis

form

powder

composition

carbon, >90%

D × L

110-170 nm × 5-9 μm

mp

3652-3697 °C (lit.)

density

1.7 g/mL at 25 °C
~2.1 g/mL at 25 °C (lit.)

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General description

Multi walled carbon nanotubes (MWNTs, CNTs) were prepared by chemical vapor deposition (CVD). In chemical vapor deposition (CVD), a volatile precursor undergoes thermal decomposition at elevated temperatures to form a solid deposit on a substrate. 1 The diameter of the tube ranges between 110-170nm and the length is between 5-9μm. The multiwalled nanotubes are stable in inert atmosphere upto a temperature of 3697oC.

Application

Carbon nanotube, multi-walled (MWNT) belongs to the class of carbonaceous materials with excellent physiochemical, thermo-mechanical and electrochemical properties. This material can be used in a variety of sustainable energy applications such as solar cells, photocatalysis, biosensor, gas sensor, supercapacitor and as a filler that acts as a reinforcement to improve the mechanical property of composites.
Toxic and immunological effects of carbon nanotubes on human colorectal cancer cell line (Caco-2), the human breast adenocarcinoma cell line(MCF-7), Calu-3 cells from human lung adenocarcinoma and serous cells of proximal bronchial airways was investigated. These multiwalled carbon nanotubes were used to design a 3D, free standing porous carbon structure. The self-supporting structures could find potential uses in energy storage, supercapacitors, photovoltaic cells, field emission devices, sensors and high performance catalysts.Polystyrene/MWNTs nanocomposites have been fabricated and studied for its electrical and optical properties. Preparation of platinum/MWNTs/cobaltite nanocomposites has also been reported.

Preparation Note

Chemical Vapor Deposition (CVD) Method

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

659258-VAR:
659258-2G:
659258-BULK:
659258-10G:

Certificates of Analysis (COA)

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Ternary platinum-multiwall carbon nanotube-cobaltite composites for methanol electrooxidation.
Awasthi R and Singh RN
International Journal of Electrochemical Science, 6, 4775-4775 (2011)
Fabrication and characterization of three-dimensional macroscopic all-carbon scaffolds.
Carbon null
Carbon nanotubes toxicology and effects on metabolism and immunological modification in vitro and in vivo.
Chiaretti M, et al.
Journal of Physics. Condensed Matter : An Institute of Physics Journal, 20(47) (2008)
Electrical and optical percolations of polystyrene latex?multiwalled carbon nanotube composites.
kara S, et al.
Journal of Colloid and Interface Science, 344(2), 395-401 (2010)
Airway barrier dysfunction induced by exposure to carbon nanotubes in vitro: which role for fiber length?.
Rotoli BM, et al.
Human & Experimental Toxicology, 28(6-7), 361-368 (2009)
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